Hybrid Cloud Architecture Cheat Sheet
Covers hybrid cloud connectivity options, common use cases, and key services like AWS Direct Connect and Azure Arc.
1 PageIntermediateFeb 15, 2026
Common Hybrid Cloud Use Cases
Why organizations run hybrid architectures.
- Data Sovereignty- Keeping regulated data on-premises while using cloud for compute/burst capacity
- Cloud Bursting- Running baseline load on-prem, scaling into the cloud during demand spikes
- Gradual Migration- Running workloads in both environments during a phased migration
- Disaster Recovery- Using cloud as a DR target for on-prem primary systems
- Latency-Sensitive Edge Workloads- Processing near the data source on-prem, aggregating in the cloud
Connectivity Options
How on-prem and cloud environments are networked together.
- Site-to-Site VPN- Encrypted tunnel over the public internet, quick to set up, variable latency
- AWS Direct Connect / Azure ExpressRoute- Dedicated private network connection, low latency, higher cost and lead time
- AWS Outposts- AWS-managed hardware installed on-prem, running native AWS APIs locally
- Azure Arc- Extends Azure management (policy, monitoring) to on-prem, multi-cloud, and edge resources
- Google Anthos- GKE-based platform for managing Kubernetes workloads across on-prem and multiple clouds
Site-to-Site VPN in Terraform (AWS)
Establishing an IPsec VPN connection between a VPC and on-prem gateway.
hcl
resource "aws_customer_gateway" "onprem" { bgp_asn = 65000 ip_address = "203.0.113.10" # on-prem public IP type = "ipsec.1"}resource "aws_vpn_gateway" "vgw" { vpc_id = aws_vpc.main.id}resource "aws_vpn_connection" "main" { customer_gateway_id = aws_customer_gateway.onprem.id vpn_gateway_id = aws_vpn_gateway.vgw.id type = "ipsec.1" static_routes_only = true}
Pro Tip
Design hybrid DNS resolution early (e.g. Route 53 Resolver forwarding rules) — most hybrid connectivity failures are actually name resolution failures between on-prem and cloud DNS zones, not routing issues.
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